X AUTOHAUX LED Bypass Flash Harness for Corvette C5 (1997–2004) C5HFH — Relay & TPA Connector Stops Hyperflash

The X AUTOHAUX C5HFH LED bypass flash harness is a plug-and-play replacement that stops fast/hyper flashing and restores correct turn-signal operation on Chevrolet Corvette Envy C5 models from 1997–2004.

Installing LED tail or turn lights on a Corvette C5 can trigger too-quick flashing, warning chimes, or inconsistent signals because LEDs draw much less current than incandescent bulbs. The C5HFH harness adds a dedicated relay and terminal-position assurance (TPA) connectors to provide the correct electrical load and reliable contacts without adding bulky resistors or modifying the vehicle wiring.

How does this harness fix hyperflashing after LED installation?

The harness replaces the factory tail-light connector with a relay-based bypass designed to mimic the original bulb load and timing. That prevents the flasher circuit from detecting a perceived bulb failure and switching to rapid flash.

• Includes integrated relay to regulate current and flash cadence.
• Stops fast-flash behavior without extra resistors.
• Maintains proper turn-signal timing for front and rear circuits.

Will it fit my Corvette C5 and how do I confirm compatibility?

This part (C5HFH) is made specifically for Chevrolet Corvette Envy C5 years 1997–2004 and is not compatible with Euro-style taillights. Always verify your model year and tail-light type before purchase.

• Part number: C5HFH — matches listed C5 model years.
• Not compatible with Euro taillight versions—check your factory lens type.
• Confirm vehicle year and tail-light assembly before ordering.

What does the harness include and how difficult is installation?

The package ships with one tail-light bypass flash harness and TPA connectors to secure terminals. Installation is straightforward for anyone familiar with basic automotive wiring, though a few simple tools and an online installation video are recommended.

• 1x C5HFH tail-light LED bypass flash harness included.
• TPA connectors ensure locked, reliable terminal connections.
• Suggested tools: T-10x4 Torx driver and a small flat screwdriver.

Are resistors or additional parts required?

No external load resistors are typically needed because the harness’s relay compensates for the low current draw of LEDs. The design avoids extra heat and wiring clutter while delivering correct flash rates.

• Relay-based solution removes the need for separate resistors.
• Cleaner installation with fewer modifications to factory wiring.
• Designed to work with most aftermarket LED tail and turn lights on C5 models.

Who is this for: The X AUTOHAUX C5HFH harness is aimed at Corvette owners upgrading to LED rear lighting who want a reliable, factory-like turn-signal behavior without splicing in load resistors. It is ideal for DIY enthusiasts and professional installers who need a compact, secure harness with TPA locking connectors and a built-in relay for consistent performance. Confirm your Corvette is a 1997–2004 Envy C5 and that you do not have Euro-style taillights before purchasing.